#!/usr/bin/env bash

# fail hard
set -o pipefail
# fail harder
set -eu

OUT_PREFIX=$1
BIN_DIR="$(cd "$(dirname "$0")"/../.. || exit; pwd)/bin"
export BIN_DIR

# Orient ourselves and build download link
dep_formula=${0#$WORKSPACE_DIR/} # this is the original script, e.g. pypy-5.3.1
BASE=${dep_formula##*/} # this gives us relative path
python_version=${BASE^} # this gives us only the filename with version number
version_number=$(echo "$python_version" | cut -d- -f2) # this returns just X.X.X
dep_url=https://python.org/ftp/python/${version_number}/${python_version}.tgz

echo "Building Python 3..."
echo "Pulling from source: ${dep_url}"

curl -L "${dep_url}" | tar xz -C "${OUT_PREFIX}"
mv "${OUT_PREFIX}/${python_version}" src
cd src

./configure --prefix=$OUT_PREFIX --with-ensurepip=no
make
make install

# Remove unneeded test directories, similar to the official Docker Python images:
# https://github.com/docker-library/python
find "${OUT_PREFIX}" \( -type d -a \( -name test -o -name tests \) \) -exec rm -rf '{}' +

# Remove spare /
LOCATION=${OUT_PREFIX%?}

ln $LOCATION/bin/python3 $LOCATION/bin/python
